Article
Astronomy & Astrophysics
Markus R. Mosbech, Celine Boehm, Yvonne Y. Y. Wong
Summary: Similar to warm dark matter, many interacting dark matter models predict a suppression of the matter power spectrum due to collisional damping. 21cm line intensity mapping can probe this suppression and set strong limits on dark matter-neutrino scattering. However, precise measurements of the matter power spectrum at high redshifts are needed to distinguish between warm dark matter and interacting scenarios.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Particles & Fields
Arvind Kumar Mishra
Summary: We calculate the shear and bulk viscosity of self interacting dark matter (SIDM) fluid using the kinetic theory formalism. We find that viscous SIDM violates the lower bound on the ratio of shear viscosity to entropy density. We also derive an upper limit on the ratio of velocity average dark matter self interaction cross-section to its mass and estimate an upper limit on SIDM mass, finding that the mass should be sub-GeV scale. Furthermore, we study the evolution of SIDM viscosity in the light of low redshift observations and show that it becomes sufficiently large at small redshifts and contributes significantly to cosmic dissipation.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Alvaro de la Cruz Dombriz, Francisco Jose Maldonado Torralba, David F. Mota
Summary: The stable pseudo-scalar degree of freedom in the quadratic Poincare Gauge theory of gravity is identified as a suitable candidate for dark matter. The study determines the parameter space in the theory that can explain all predicted cold dark matter phenomena and constrains these parameters with astrophysical observations.
Article
Astronomy & Astrophysics
Keshav Ram Mishra, Shibesh Kumar Jas Pacif, Rajesh Kumar, Kazuharu Bamba
Summary: In this paper, an interacting dark energy model is studied by assuming gravitational interaction between matter fields and dark energy in a spatially homogeneous and isotropic Friedmann-Robertson-Walker space-time. The cosmic evolution is examined in the framework of an interacting scenario using a suitable ansatz for the scale factor parametrization of the Hubble parameter. The evolution of cosmological parameters, including deceleration parameter, energy density, pressure, and equation of state, is discussed in detail. Cosmological tests and analysis are performed to support the obtained interacting model. Additionally, the potential of the scalar field is reconstructed and the refined swampland conjecture is refuted using the equation of state and relationships between energy density, pressure, scalar field, and potential.
PHYSICS OF THE DARK UNIVERSE
(2023)
Article
Physics, Particles & Fields
Swagat S. Mishra, Varun Sahni
Summary: Non-canonical scalar fields with specific Lagrangian properties have the capability to exhibit dark matter-like behavior on small scales. By manipulating the potential term, the kinetic term can be utilized as dark matter while the potential term plays the role of dark energy later on. Simple potentials like V = V-0 coth(2) phi and Starobinsky-type potentials can unify dark matter and dark energy, and cascading dark energy models are also effective in this unification.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Yu-Dai Tsai, Robert McGehee, Hitoshi Murayama
Summary: This paper presents new models based on QCD-like dark sectors to solve small-scale structure problems. By drawing analogies to the meson spectra in standard model QCD, the models introduce resonant self-interacting dark matter and discuss experimental probes for both setups. The paper also comments on the resonant self-interactions already built into SIMP and ELDER mechanisms.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Emil Brinch Holm, Thomas Tram, Steen Hannestad
Summary: Decaying dark matter models can impact the predicted value of the Hubble constant and bridge the discrepancies between CMB inferences and local measurements. In this study, a reevaluation of the warm dark matter decaying model is performed, including the mass of the decaying species, and its ability to alleviate tensions in Hubble and sigma(8) is assessed. The model shows mild improvements but further research is required to fully evaluate its effectiveness.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Matteo Lucca
Summary: The study examines a dynamic fluid model of dark energy that shows promising results in addressing the S-8 tension without significantly impacting other tensions or fit to the data sets.
PHYSICS OF THE DARK UNIVERSE
(2021)
Article
Astronomy & Astrophysics
Jiangang Kang
Summary: This work focuses on modeling the direct interaction between dark energy and dark matter in the universe with dimensionless parameters alpha and beta. The results suggest that this interaction model is favored by observational data and has key effects on the CMB power spectrum and linear matter power spectrum.
PHYSICS OF THE DARK UNIVERSE
(2021)
Article
Astronomy & Astrophysics
Philip Bull, Martin White, Anze Slosar
Summary: This study investigates constraints on the behavior of dynamical dark energy in the matter-dominated era, finding that existing CMB and LSS measurements have constrained the dark energy equation of state during this period. It also examines how forthcoming galaxy surveys and 21cm intensity mapping instruments can further improve constraints in this regime.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Wenyu Wang, Wu-Long Xu, Bin Zhu
Summary: This study investigates the influence of the intrinsic interaction of dark matter self-scattering on structure formation. By introducing a simplified model and a new definition of velocity dependence, the impact of dark protons on cosmological structures is revealed.
Article
Physics, Particles & Fields
Vicente Vento
Summary: The study focuses on the existence of monopoles and dipoles in Kaluza-Klein multidimensional theories, with the observation that monopoles interact with time-dependent magnetic fields to radiate in a manner that is undetectable by conventional equipment. This suggests that Kaluza-Klein monopolium, if existent, could potentially be a candidate for a primordial dark matter constituent.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Francesco Pace, Carlo Schimd
Summary: This study extends the analysis of Pace et al. by considering the virialization process in clustering dark-energy models. The research finds that five out of seven clustering dark-energy models can be statistically distinguished from the Lambda CDM model and the corresponding smooth dark-energy models in large-scale surveys.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Claudia de Rham, Scott Melville, Johannes Noller
Summary: Positivity bounds have been used to constrain scalar-tensor theories of dark energy, but coupling to matter fields has played a limited role. Demanding positivity when including interactions with standard matter fields leads to further constraints on the dark energy parameter space. Implementing these bounds as theoretical priors affects cosmological parameter constraints and shows that gravitational waves must travel superluminally on cosmological backgrounds in a standard UV completion.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Jozef Bucko, Sambit K. Giri, Aurel Schneider
Summary: From observations at low and high redshifts, it is well known that the bulk of dark matter (DM) has to be stable or very long-lived, but the possibility of a small fraction or all of the DM decaying with a significantly longer half-life time than the age of the Universe is not ruled out. In this study, the researchers investigated models in which a fraction or all DM decays into radiation, focusing on the long-lived regime. They used data from the Kilo-Degree Survey (KiDS) for weak-lensing analysis and CMB data from Planck. The results showed that the constraints on DM decay are more stringent from CMB data than from weak-lensing data.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Physics, Multidisciplinary
Rafael C. Nunes
Summary: This article investigates the significance of sub-solar mass binary detection and finds that the potential discovery of ultra-compact objects will provide new perspectives on the existence of non-astrophysical black holes and the formation of exotic ultra-compact objects. By simulating the detection, the article derives the merger rate of the sub-solar mass binaries and discusses its consequences on the abundances of primordial black holes.
Article
Astronomy & Astrophysics
Felipe Avila, Armando Bernui, Rafael C. Nunes, Edilson de Carvalho, Camila P. Novaes
Summary: The study presents a novel approach to obtaining the growth rate of cosmic structures from the evolution of the cosmic homogeneity scale. The results show consistency between the growth rate obtained through the proposed approach, the expected growth rate in the standard model, and the best-fitting growth rate from existing data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Review
Astronomy & Astrophysics
Elcio Abdalla, Guillermo Franco Abellan, Amin Aboubrahim, Adriano Agnello, Ozgur Akarsu, Yashar Akrami, George Alestas, Daniel Aloni, Luca Amendola, Luis A. Anchordoqui, Richard I. Anderson, Nikki Arendse, Marika Asgari, Mario Ballardini, Vernon Bargerx, Spyros Basilakos, Ronaldo C. Batista, Elia S. Battistelli, Richard Battye, Micol Benetti, David Benisty, Asher Berlin, Paolo de Bernardis, Emanuele Berti, Bohdan Bidenko, Simon Birrer, John P. Blakeslee, Kimberly K. Boddy, Clecio R. Bom, Alexander Bonilla, Nicola Borghi, Francois R. Bouchet, Matteo Braglia, Thomas Buchert, Elizabeth Buckley-Geer, Erminia Calabrese, Robert R. Caldwell, David Camarena, Salvatore Capozziello, Stefano Casertano, Angela Chen, Geoff C-F Chen, Hsin-Yu Chen, Jens Chluba, Anton Chudaykin, Michele Cicoli, Craig J. Copi, Fred Courbin, Francis-Yan Cyr-Racine, Bozena Czerny, Maria Dainotti, Guido D'Amico, Anne-Christine Davis, Javier de Cruz Perez, Jaume de Haro, Jacques Delabrouille, Peter B. Denton, Suhail Dhawan, Keith R. Dienes, Eleonora Di Valentino, Pu Du, Dominique Eckert, Celia Escamilla-Rivera, Agnes Ferte, Fabio Finelli, Pablo Fosalba, Wendy L. Freedman, Noemi Frusciante, Enrique Gaztanaga, William Giare, Elena Giusarma, Adria Gomez-Valent, Will Handley, Ian Harrison, Luke Hart, Dhiraj Kumar Hazra, Alan Heavens, Asta Heinesen, Hendrik Hildebrandt, J. Colin Hill, Natalie B. Hogg, Daniel E. Holz, Deanna C. Hooper, Nikoo Hosseininejad, Dragan Huterer, Mustapha Ishak, Mikhail M. Ivanov, Andrew H. Jaffe, In Sung Jang, Karsten Jedamzik, Raul Jimenez, Melissa Joseph, Shahab Joudaki, Marc Kamionkowski, Tanvi Karwal, Lavrentios Kazantzidis, Ryan E. Keeley, Michael Klasen, Eiichiro Komatsu, Leon V. E. Koopmans, Suresh Kumar, Luca Lamagna, Ruth Lazkoz Dn, Chung-Chi Lee, Julien Lesgourgues, Jackson Levi Said, Tiffany R. Lewis, Benjamin L'Huillier, Matteo Lucca, Roy Maartens, Lucas M. Macri, Danny Marfatia, Valerio Marra, Carlos J. A. P. Martins, Silvia Masi, Sabino Matarrese, Arindam Mazumdar, Alessandro Melchiorri, Olga Mena, Laura Mersini-Houghton, James Mertens, Dinko Milakovic, Yuto Minami, Vivian Miranda, Cristian Moreno-Pulido, Michele Moresco, David F. Mota, Emil Mottola, Simone Mozzon, Jessica Muir, Ankan Mukherjee, Suvodip Mukherjee, Pavel Naselsky, Pran Nath, Savvas Nesseris, Florian Niedermann, Alessio Notari, Rafael C. Nunes, Eoin O. Colgain, Kayla A. Owens, Emre Ozulker, Francesco Pace, Andronikos Paliathanasis, Antonella Palmese, Supriya Pan, Daniela Paoletti, Santiago E. Perez Bergliaffa, Leandros Perivolaropoulos, Dominic W. Pesce, Valeria Pettorino, Oliver H. E. Philcox, Levon Pogosian, Vivian Poulin, Gaspard Poulot, Marco Raveri, Mark J. Reid, Fabrizio Renzi, Adam G. Riess, Vivian Sabla, Paolo Salucci, Vincenzo Salzano, Emmanuel N. Saridakis, Bangalore S. Sathyaprakash, Martin Schmaltz, Nils Schoneberg, Dan Scolnic, Anjan A. Sen, Neelima Sehgal, Arman Shafieloo, M. M. Sheikh-Jabbari, Joseph Silk, Alessandra Silvestri, Foteini Skaraj, Martin S. Sloth, Marcelle Soares-Santos, Joan Sola Peracaula, Yu-Yang Songsheng, Jorge F. Soriano, Denitsa Staicova, Glenn D. Starkman, Istvan Szapudi, Elsa M. Teixeira, Brooks Thomas, Tommaso Treu, Emery Trott, Carsten van de Ruck, J. Alberto Vazquez, Licia Verde, Luca Visinelli, Deng Wang, Jian-Min Wang, Shao-Jiang Wang, Richard Watkins, Scott Watson, John K. Webb, Neal Weiner, Amanda Weltman, Samuel J. Witte, Radoslaw Wojtak, Anil Kumar Yadav, Weiqiang Yang, Gong-Bo Zhao, Miguel Zumalacarregui
Summary: The paper discusses the limitations of the standard Lambda Cold Dark Matter (Lambda CDM) cosmological model and proposes new physics models to alleviate the tensions in various cosmological measurements. The authors emphasize the importance of considering a wide range of data and discuss the significance of upcoming experiments and space missions in addressing open questions in cosmology.
JOURNAL OF HIGH ENERGY ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Suresh Kumar, Rafael C. Nunes, Priya Yadav
Summary: The study reports observational constraints on the cosmic neutrino properties using the latest observational data and finds that combining FS power spectrum measurements with CMB data significantly improves the models' parametric space. The results confirm the predictions of standard cosmological theory regarding neutrino properties.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Review
Physics, Particles & Fields
Pau Amaro-Seoane, Jeff Andrews, Manuel Arca Sedda, Abbas. Askar, Quentin Baghi, Razvan Balasov, Imre Bartos, Simone S. Bavera, Jillian Bellovary, Christopher P. L. Berry, Emanuele Berti, Stefano Bianchi, Laura Blecha, Stephane Blondin, Tamara Bogdanovic, Samuel Boissier, Matteo Bonetti, Silvia Bonoli, Elisa Bortolas, Katelyn Breivik, Pedro R. Capelo, Laurentiu Caramete, Federico Cattorini, Maria Charisi, Sylvain Chaty, Xian Chen, Martyna Chruslinska, Alvin J. K. Chua, Ross Church, Monica Colpi, Daniel D'Orazio, Camilla Danielski, Melvyn B. Davies, Pratika Dayal, Alessandra De Rosa, Andrea Derdzinski, Kyriakos Destounis, Massimo Dotti, Ioana Dutan, Irina Dvorkin, Gaia Fabj, Thierry Foglizzo, Saavik Ford, Jean-Baptiste Fouvry, Alessia Franchini, Tassos Fragos, Chris Fryer, Massimo Gaspari, Davide Gerosa, Luca Graziani, Paul Groot, Melanie Habouzit, Daryl Haggard, Zoltan Haiman, Wen-Biao Han, Alina Istrate, Peter H. Johansson, Fazeel Mahmood Khan, Tomas Kimpson, Kostas Kokkotas, Albert Kong, Valeriya Korol, Kyle Kremer, Thomas Kupfer, Astrid Lamberts, Shane Larson, Mike Lau, Dongliang Liu, Nicole Lloyd-Ronning, Giuseppe Lodato, Alessandro Lupi, Chung-Pei Ma, Tomas Maccarone, Ilya Mandel, Alberto Mangiagli, Michela Mapelli, Stephane Mathis, Lucio Mayer, Sean McGee, Berry McKernan, M. Coleman Miller, David F. Mota, Matthew Mumpower, Syeda S. Nasim, Gijs Nelemans, Scott Noble, Fabio Pacucci, Francesca Panessa, Vasileios Paschalidis, Hugo Pfister, Delphine Porquet, John Quenby, Angelo Ricarte, Friedrich K. Roepke, John Regan, Stephan Rosswog, Ashley Ruiter, Milton Ruiz, Jessie Runnoe, Raffaella Schneider, Jeremy Schnittman, Amy Secunda, Alberto Sesana, Naoki Seto, Lijing Shao, Stuart Shapiro, Carlos Sopuerta, Nicholas C. Stone, Arthur Suvorov, Nicola Tamanini, Tomas Tamfal, Thomas Tauris, Karel Temmink, John Tomsick, Silvia Toonen, Alejandro Torres-Orjuela, Martina Toscani, Antonios Tsokaros, Caner Unal, Veronica Vazquez-Aceves, Rosa Valiante, Maurice van Putten, Jan van Roestel, Christian Vignali, Marta Volonteri, Kinwah Wu, Ziri Younsi, Shenghua Yu, Silvia Zane, Lorenz Zwick, Fabio Antonini, Vishal Baibhav, Enrico Barausse, Alexander Bonilla Rivera, Marica Branchesi, Graziella Branduardi-Raymont, Kevin Burdge, Srija Chakraborty, Jorge Cuadra, Kristen Dage, Benjamin Davis, Selma E. de Mink, Roberto Decarli, Daniela Doneva, Stephanie Escoffier, Poshak Gandhi, Francesco Haardt, Carlos O. Lousto, Samaya Nissanke, Jason Nordhaus, Richard O'Shaughnessy, Simon Portegies Zwart, Adam Pound, Fabian Schussler, Olga Sergijenko, Alessandro Spallicci, Daniele Vernieri, Alejandro Vigna-Gomez
Summary: The Laser Interferometer Space Antenna (LISA) is an innovative experiment for gravitational wave astronomy, offering unique opportunities to address key astrophysical questions in a novel way. By synergizing with ground-based and space-born instruments, LISA enables multi-messenger observations, enhancing its discovery potential. This review highlights the extensive landscape of astrophysical theory, numerical simulations, and astronomical observations necessary for modeling and interpreting LISA's upcoming datastream. It also discusses open issues, gaps in understanding, and potential research avenues that LISA can contribute to in combination with electromagnetic domain studies.
LIVING REVIEWS IN RELATIVITY
(2023)
Article
Astronomy & Astrophysics
Gabriella Agazie, Akash Anumarlapudi, Anne M. Archibald, Paul T. Baker, Bence Becsy, Laura Blecha, Alexander Bonilla, Adam Brazier, Paul Brook, Sarah Burke-Spolaor, Rand Burnette, Robin Case, J. Andrew Casey-Clyde, Maria Charisi, Shami Chatterjee, Katerina Chatziioannou, Belinda D. Cheeseboro, Siyuan Chen, Tyler Cohen, James M. Cordes, Neil J. Cornish, Fronefield Crawford, H. Thankful Cromartie, Kathryn Crowter, Curt E. Cutler, Daniel J. D'Orazio, Megan E. DeCesar, Dallas DeGan, Paul B. Demorest, Heling Deng, Timothy Dolch, Brendan Drachler, Elizabeth Ferrara, William Fiore, Emmanuel Fonseca, Gabriel E. Freedman, Emiko Gardiner, Nate Garver-Daniels, Peter A. Gentile, Kyle A. Gersbach, Joseph Glaser, Deborah C. Good, Kayhan Gultekin, Jeffrey Hazboun, Sophie J. Hourihane, Kristina Islo, Ross L. Jennings, Aaron Johnson, Megan L. Jones, Andrew R. Kaiser, David L. Kaplan, Luke Zoltan Kelley, Matthew Kerr, Joey S. Key, Nima Laal, Michael T. Lam, William G. Lamb, T. Joseph W. Lazio, Natalia B. Lewandowska, Tyson Littenberg, Tingting Liu, Jing Luo, Ryan S. Lynch, Chung-Pei Ma, Dustin R. Madison, Alexander McEwen, James A. McKee, Maura A. McLaughlin, Natasha McMann, Bradley M. Meyers, Patrick M. Meyers, Chiara M. F. Mingarelli, Andrea Mitridate, Priyamvada Natarajan, Cherry J. Ng, David J. Nice, Stella Koch Ocker, Ken T. Olum, Timothy Pennucci, Benetge B. P. Perera, Polina Petrov, Nihan S. Pol, Henri A. Radovan, Scott M. Ransom, Paul S. Ray, Joseph C. Romano, Jessie C. Runnoe, Shashwat C. Sardesai, Ann Schmiedekamp, Carl Schmiedekamp, Kai Schmitz, Levi Schult, Brent Shapiro-Albert, Xavier Siemens, Joseph Simon, Magdalena S. Siwek, Ingrid H. Stairs, Daniel Stinebring, Kevin Stovall, Jerry P. Sun, Abhimanyu Susobhanan, Joseph K. Swiggum, Jacob Taylor, Stephen R. Taylor, Jacob E. Turner, Caner Unal, Michele Vallisneri, Sarah J. Vigeland, Jeremy M. Wachter, Haley M. Wahl, Qiaohong Wang, Caitlin Witt, David Wright, Olivia Young
Summary: The NANOGrav 15 yr data set provides evidence for the presence of a low-frequency gravitational-wave background, possibly originating from distributed supermassive black hole binaries in the universe. The study shows that astrophysically motivated models of binary populations can reproduce the observed low-frequency gravitational-wave spectrum, emphasizing the importance of accurately modeling binary evolution. Additionally, the results suggest the need for parameters to be at extreme values or notably different from standard expectations to explain the implied GWB amplitude.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Armando Bernui, Eleonora Di Valentino, William Giare, Suresh Kumar, Rafael C. Nunes
Summary: In this study, we use a compilation of 15 measurements of the 2D baryon acoustic oscillation (BAO) scale and Planck-CMB data to explore a class of interacting dark energy (DE) and dark matter (DM) cosmological models. We find that 2D BAO measurements can provide different observational constraints compared to the traditional 3D BAO measurements. Contrary to previous observations, Planck-CMB + 2D BAO data suggest higher values for the Hubble constant H0. Through joint analysis with additional Gaussian prior on H0, we conclude that the H0 tension is resolved in the interacting DE model with strong statistical evidence (more than 3 sigma).
Article
Astronomy & Astrophysics
Rocco Agostino, Rafael C. Nunes
Summary: This work explores the impact of modified gravity theories based on the nonmetricity scalar, known as f(Q) gravity, on the propagation of gravitational waves. The study discusses forecast constraints on f(Q) gravity using simulated sources and mergers of black hole binaries. The findings suggest that future gravitational wave observations by ET and LISA will provide a unique and accurate way to test the nature of gravity.
Article
Astronomy & Astrophysics
Rafael C. Nunes, Sunny Vagnozzi, Suresh Kumar, Eleonora Di Valentino, Olga Mena
Summary: In this study, we explore the role of redshift-space galaxy clustering data in constraining nongravitational interactions between dark energy (DE) and dark matter (DM). By combining the data from galaxy power spectrum and Baryon Acoustic Oscillation (BAO) measurements with Cosmic Microwave Background (CMB) data, we obtain one of the strongest limits on the DM-DE coupling strength. Contrary to previous observations, we find that the combination of CMB and full-shape (FS) galaxy power spectrum returns tighter constraints compared to the combination of CMB and BAO, indicating valuable additional information in the broadband of the power spectrum. Our results highlight the critical role of redshift-space galaxy clustering measurements in precision cosmology.